IEEE 802.3at PoE High-Power PD Interface with External Gate Driver


Special Note

In need of IEE802.3bt compliance? Check out the TPS2373


The TPS2379 device is an 8-pin integrated circuit that contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD) such as Detection, Classification, Type 2 Hardware Classification, and 140-mA inrush current limit during startup. The low 0.5-Ω internal switch resistance, combined with the enhanced thermal dissipation of the PowerPAD package, enables this controller to continuously handle up to 0.85 A. The TPS2379 integrates a low 0.5-Ω internal switch to allow for up to 0.85 A of continuous current through the PD during normal operation. The TPS2379 device supports higher-power applications through an external pass transistor. The TPS2379 contains several protection features such as thermal shutdown, current limit foldback, and a robust 100-V internal switch.


  • IEEE 802.3at Type-2 Hardware Classification With
    Status Flag
  • Auxiliary Gate Driver for High-Power Expansion
  • Robust 100-V, 0.5-Ω Hotswap MOSFET
  • 1A (Typical) Operating Current Limit
  • 140 mA (Typical) Inrush Current Limit
  • DC-DC Converter Enable
  • 15 kV/8 kV System-level ESD Capability
  • PowerPAD™ HSOP Package

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Parametrics Compare all products in Powered Device

Vin (Min) (V)
Vin (Max) (V)
PoE Current Limit (Min) (mA)
PoE Inrush Limit (Typ) (mA)
rDS(on) per FET (Typ) (mOhms)
PoE Standards Supported
PD Power Level
DC/DC Control
Fault Response
Package Group
Package Size: mm2:W x L (PKG)
TPS2379 TPS2378
0    0   
57    57   
850    850   
140    140   
420    420   
802.3at Type 1 (802.3af)
802.3at Type 2
Non Standard   
802.3at Type 1 (802.3af)
802.3at Type 2   
PD Only    PD Only   
Auto Retry    Auto Retry   
Thermal Shutdown    PG
Thermal Shutdown   
SO PowerPAD    SO PowerPAD   
8SO PowerPAD: 29 mm2: 6 x 4.9(SO PowerPAD)    8SO PowerPAD: 29 mm2: 6 x 4.9(SO PowerPAD)   
8SO PowerPAD    8SO PowerPAD